• 한국지리정보학회지
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• 제3권1호
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• pp.57-68
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• 2000

본 연구는 가로수관리정보시스템의 실용화를 위한 선행과제로서, 속성정보와 수치지도를 연계시키기 위한 코드부여방법을 연구하여 대구시를 대상지로 합리적인 방법을 알아보고자 함을 그 목적으로 하였다. 따라서, 코드체계의 고유성, 영구성, 단순성, 다용도성, 유지 및 위치파악의 용이성 등을 고려하여 가로수 위치 표현을 위한 11가지 코드요소를 선정 및 분석하고 다양한 조합을 통하여 장단점을 비교한 후 현실성 있는 11가지의 방법에 대해서는 대구시의 1/500 수치지도를 근거로 실제 적용하였다. 이를 근거로 하여, 동경계를 기준으로 일련번호를 적용한 방법과 거리측정을 근거로 한 상대좌표방법 등이 대구시에 적용할 수 있는 방안임을 제시하였다.

• 환경영향평가
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• 제14권5호
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• pp.247-254
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• 2005

Road traffic noise has increasing broader effects on urban areas as well as rural areas because of rapidly increasing traffic volume and newly-constructed roads. 10 sites in building development areas were selected and the noise level were measured by the apartment floors and by the various block plans of apartment complex. Analysis result, about correction factor, in the case of right angle arrangement, apply - 2.5dB(A). In the case of apartment house correlation of each floor apply 1st floors 0dB(A), 2st floors 1.2dB(A), 3st floors 2.1dB(A), 4st floors 2.6dB(A), 5st floors 2.7dB(A), 6st floors 2.7dB(A), 7st floors 2.4dB(A), 8st floors 2.0dB(A), 9st floors 1.6dB(A), 10st floors 1.1dB(A), 13st floors 0.2dB(A), 15st floors 0.5dB(A). The level of road traffic noise in the arrangement construction of right angle was about 3.0dB(A) at N-4 point and 2.1dB(A) at N-6 point lower than that of a plan figure, respectively. The results suggested that application of correction coefficient obtained by the apartment floor and by the arrangement construction can be improved in road traffic noise. The results suggested that application of correction coefficient obtained by the apartment floor and by the arrangement construction can be improved in road traffic noise.

• 한국자동차공학회논문집
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• 제13권5호
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• pp.7-18
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• 2005

Over the past twenty years, the maintenance system has been developed and its importance has been increased. For the effective maintenance of the urban transit, we have developed the maintenance system based on the concept of RCM(Reliability Centered Maintenance). RCM analysis is a systematic approach to developing a cost-effective maintenance strategy based on the various components's reliability of the system in question. It is performed according to process that includes the following steps; definition of function and functional failures of the systems, construction of RB D(Reliability Block Diagram), performance of FMEA(Failure Modes & Effects Analysis) and calculation of the reliability index. The final process of RCM is to determine appropriate failure maintenance strategies. This paper aims to define the procedure of maintenace based on the concept of RCM for urban transit. The key for a successful maintenance system is an automated scheduling to the maximum extent possible and timely executions. The developed system issues maintenance plan and repair request based on analyzed data and maintenance experience.

• 정보처리학회논문지D
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• 제10D권6호
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• pp.927-934
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• 2003

데이터베이스 질의 최적화기는 가장 효율적인 실행계획을 구하기 위해서 질의의 선택율을 추정한다. 일반적으로 애트리뷰트들은 서로 독립적이지 않기 때문에 여러 개의 애트리뷰트를 가지는 질의에 대해서는 다차원 선택을 추정 기법이 필요하다. 대부분의 상용 데이터베이스에서는 히스토그램이 계산 오버헤드가 많지 않고 작은 에러율로 데이터 분포를 를 근사 시킬 수 있기 때문에 실용적으로 많이 사용되고 있다. 그러나 여러 개의 애트리뷰트를 가진 다차원 지?l의 경우에서는 차원이 높아 질수록 에러율을 낮추기 위해 많은 저장 공간을 필요로 하기 때문에 히스토크램 방법이 적합하지 않다. 이 논문에서는 다차원 선택을 추정을 위한 새로운 기법을 제안한다. 다차원 공간에서 크기가 작은 히스토그램 버켓을 많이 만들고 이 버켓의 정보를 DCT로 압축하여 선택을 추정에 사용함으로써 에러율을 작게 하고 저장 공간의 사용량도 줄인다. 폭 넓은 실험 결과는 본 논문에서 제시한 방법들의 타당성과 이점을 확인시켜 준다.

• Imaging Science in Dentistry
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• 제40권2호
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• pp.75-81
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• 2010

Purpose : This study is aimed to evaluate the position of mandibular foramen of mandibula prognathism patients using 3-dimensional CT images in order to reduce the chance of an anesthetic failure of the mandibular nerve and to prevent the damage to the inferior alveolar nerve during the orthognathic surgery. Materials and Methods : The control group consist of 30 patients with class I occlusion. The experimental group consist of 44 patients with class III malocclusion. Three-dimensional computed tomography was used to evaluate the position of the mandibular foramina. Results : The distance between mandibular plane and mandibular foramen, class I was 25.385 mm, class III was 23.628 mm. About the distance between occlusal plane and mandibular foramen, class I was 1.478 mm, class III was 5.144 mm. The distance between posterior border plan of mandibular ramus and mandibular foramen had not statistically significant. About the distance between sagittal plane of mandible and mandibular foramen did not also showed statistically significant. Conclusion : The result of this study could help the clinicians to apprehend more accurate anatomical locations of the foramina on the mandible with various facial skeletal types. thereby to perform more accurate block anesthesia of the mandibular nerve and osteotomy with minimal nerve damage. In addition, this study could provide fundamental data for any related researches about the location of the mandibular foramina for other purposes.

• 대한안전경영과학회지
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• 제17권2호
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• pp.117-127
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• 2015

This study investigated the smoke blocking and control systems for the safety of residents evacuation and for the prevention of smoke spread through the central corridor in the event of central corridor type of intelligent building fire. We offered additional ways of utilizing smoke ventilators and intake ventilation equipment and utilized CFD-based fire simulation program(FDS Ver.5.5.3) in order to analyze the effect. As a result, many differences in the smoke block effect, depending on the application of smoke ventilator and location of installation, was found. In addition, the result was found that larger effect was showed not in the case of application of smoke ventilator in central corridor only but application in fire room. The reason is that the smoke leakage is blocked primarily as air is flowed in the fire room through open door by operation of intake smoke ventilator in the public corridor and secondarily, the smoke leakage to the public corridor could be blocked as fire and smoke were released to the opened smoke ventilator continuously. Especially, the effect was maximized through complex interactions by applying smoke ventilator and intake ventilation equipment in corridor together rather than applying smoke ventilator and intake ventilation equipment independently. The proposed measure through this study shall be considered from architectural plan as one of ways for blocking from smoke spread to the central corridor in the central corridor type of intelligent building. In addition, flaws on regulation shall be established and supplemented.

• 대한조선학회논문집
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• 제50권4호
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• pp.262-271
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• 2013

Owing to the development of mobile communication technology during the last a few years, the number of users of mobile devices such as the smartphone and the tablet PC has increased rapidly. As a result, the range of applications of the mobile devices has also been greatly expanded from an application for the convenience of daily life to an application for assisting the operations of industrial fields. Especially, portability of mobile devices can provide great help in collecting and using information on the production site. In shipbuilding production processes, it is difficult to collect changes of circumstance in the field and reflect the changes to schedule due to the low production automation rate and frequent changes in schedule. In this study, we propose a system to solve the problems of shipbuilding production processes such as the ones described above by using mobile devices. First of all, we organize the production information and production processes of the panel line through the analysis of shipyard panel line operations. Next, we have developed a system that can support the production execution plan of the panel line and monitor the production processes in the field. The system was developed utilizing application virtualization to allow access to the system from various platforms of mobile devices and PC's. The system was implemented using ooCBD methodology considering the future expansion of the system and ease of maintenance.

• 한국태양에너지학회 논문집
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• 제40권2호
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• pp.25-36
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• 2020

The Korean government has a plan to mandate zero-energy buildings in 2020 for public and 2025 for private buildings. In order to design a zero-energy building, insulation and airtightness, which are the most basic elements of passive house technology, are required, and the government has been accomplished this through step-by-step strengthening of related standards. In passive house with high thermal insulation and airtightness performance, the heat introduced into the building through solar radiation can be stored for a long time to keep the inside warm during winter. On the other hand, during summer, heat introduced into the building cannot be easily released to outside, so it is necessary to actively block solar radiation and high temperature outdoor air to prevent an increase of indoor temperature. Therefore, this study aims to derive an appropriate operation condition of passive house to maintain the indoor temperature at an suitable level according to the ventilation methods and solar shading conditions. As a result, under the conditions that the outdoor temperature was 28℃ or less, the ventilation using a heat recovery ventilation system at daytime and natural ventilation at nighttime were selected for the most appropriate operation method. In addition, in the case of solar shading, it was found that blocking solar radiation at daytime using the blind and open the blind at nighttime to ensure natural ventilation were selected for the most appropriate solar shading condition.

• 한국농촌건축학회논문집
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• 제17권3호
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• pp.11-18
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• 2015

This study is aimed to clarify the transitional characteristics of old roads and alleys lasting more than 100 years(1915-2015) in traditional urban area(Seongan-dong) of cheongju, historic inland and castle city of Korea. Cheongju castle had been completely destroyed In 1915, and urban structures been also altered last 100 years from 2015 now. Periodically, after destruction of castle, existing roads were extended and transformed to straight line for connecting with around. Expanding urban area to all directions of castle boundary in 1930-40s, town planning were created. These projects were completed in 1960-70s, the street network was built as they are. Since the 1980s, changes had been occurred in the details such as an extension of the unexecuted roads, the opening of fire lane in a block, and etc. In change and construction of roads, urban district plan in 1939 and reorganization since 1967 were planned and established with the type, location, and width of the large, medium and small roads based on data before destruction of castle. Except the width of 25m Sajikro(large3-1) and Sangdangro(large3-8,9,10), the width of 15m Namsaro(medium2-1) and Namjuro (medium2-4) as an extension of the roads, the other roads were small roads equivalent to the existing roads, and so remain intact figure of streetscape. As such, roads of east-west and north-south cross type, roads showing the outline of Cheongju castle fortress, and alleys outside the south gate are sustained in Seongan-dong of cheongju as historic urban area, and also present roads are delicately executed to the existing urban fabric.

• 한국수자원학회논문집
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• 제39권1호
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• pp.35-46
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• 2006

본 연구에서는 안전하고 원활한 용수공급을 목적으로 하는 상수도관망시스템의 오염예방 및 위험관리를 위한 통합의사결정시스템의 기본구조를 제시하고 유럽과 미국에서 널리 사용되고 있는 다기준 의사결정기법인 PROMETHEE와 ANP를 적용해 상수도관망의 이상징후 판정을 위한 위험요소들의 우선순위를 평가하였다. 문제 구성을 위하여 pH 잔류염소농도, 유량, 수압, 전기전도도, 탁도, 블록누수량, 수온을 자료항목으로 선정하였고 관부식, 관파열, 관내수질오염을 평가기준으로 하여 PROMETHEE와 ANP의 결과를 비교 분석하였다. 본 연구에서 제시한 상수도관망의 위험요소 평가결과는 위기상황 대처방안시스템 구축시 사고대응 제어알고리즘 설계의 기초자료가 될 수 있을 것이다.